“I recognize the complex challenges that misinformation presents to online platforms,” Schiff writes. “As we all grapple with this unprecedented health situation, I hope you will consider this suggestion for keeping users better informed.”

Facebook declined to comment on the letters. Google didn’t responded to a request for comment, though a spokesperson for Google-owned YouTube says the platform has invested heavily in recent years in removing content that violates its policies and in boosting authoritative content.

“Since early February, we’ve removed thousands of videos violating our COVID-19 misinformation policies — such as content that disputes the existence or transmission of COVID-19 as described by local health authorities, or that promotes medically unsubstantiated methods to prevent or cure COVID-19 in place of seeking medical treatment — and have seen over 20 billion impressions on our information panels for COVID-19 related videos and searches,” the spokesperson said. “Our work is ongoing and we’re committed to providing timely and helpful information during this critical time.”

Wojcicki on Friday also tweeted a response to Schiff, saying YouTube is working “every day to protect people from misinformation and help them find authoritative information.”

Thanks for reaching out. @YouTube, we’re working every day to protect people from misinformation and help them find authoritative information. We appreciate your partnership and will continue to consult with Members of Congress as we address the evolving issues around #COVID19. https://t.co/sHaLrsDpdl